Disinfectant.



HEINRICH IBECHHOLD, OF IRAHKFOBT-ON-THE-MAIN, GERMANY, lASS IGNOR T0 CHEMISGHE FABBIK LAIDENBURG G. M. B, H., 015 LADENBUBG, GERMANY- nrsmrncrnnr.

1 232 18 Specification of Letters Patent.

No Drawing. I Applicationllled December 28, 1909. serial Ito. 535,258.

To all whom it may concern."

Be it known that I, HEINRICH Bncnnonn,

a subject of the King of Prussia, and residing at Frankfort-on-the-Main, Germany, have discovered a certain new and Improved Disinfectant, of which the following is a specification.

My invention relates to disinfectants and is based upon the discovery that for the power of the betanaphthols' against certain bacteria is increased by the introduction of halogen atoms up to the number of 4,'1nto the molecule of said betanaphthols. If more halogen atoms are introduced, these do not' increase the disinfecting action .attalned' through the addition 'of 4' atoms only. It has also been ascertained that the various halogen derivatives of beta-naphthol 'afi'ect the different bacteria in a' very varying degree.

For example, triand tetrabrom betanaphthols have an especially strong influence upon staphyloand streptococci; dichlorbetanaphthol upon paratyphus bacilli; di-

brom betana hthol upon bacteria coli. This strong disinfecting action of isolated halogen naphthols'permits their elfective appllcation 1n certain cases, either alone or mixed with other disinfecting agents, as other ha- 'p logenated naphthols. a

, In addition to these essential properties of the halogenated betanaphthols as disinfect ing agents, there are two other circumstances which seem to make these two productsespecially adapted for the above purposes, namely, the nonpoisonous character toward the human organism and the almost entire lack of smell.

As a result of the insolubilitv of the free halogenated betanaphthols in water and in consequence of the ready solubility of their salts in water, and furthermore, owing to the more or less ready solubility in alcohol, oils, fats, solutions of salicylates and salt solutions of various sulfo acids, extensive employment of these disinfecting agents is made possible in appropriate cases. p

Ihe application of my invention may be illustrated by the following examples :-Triof a potash soap, of which 1 com. is poured in 6.5 li.ters water (1:130,000), 20cm. of this diluted mixture are added to 2 com. bOlllllOIl, which isinfected with 2 drops of a 24-hour culture of coli-bouillon, when the bacteria will not reach development; If 400 ccm. water are added to this'solution of dibrom betanaphthol in an alcoholic potash soap solution, so that the, solution contains 1% dib'rom betanaphthol, this will destroy an agar-culture'of coli in three minutes, The addition of water has the effect of freeing the disinfecting agent in the form of a milky emulsion or suspension.

As above stated, among the halogenated beta-naphthols the chlorinated and brominated have been found the most efi'ective and are substantial equivalentsbf each other.-

Consequently in the following claim the exployed with the distinct understanding that a chlorinated beta-naphthol is its substantial equivalent. j

"I claim. as my invention:

As a new article of manufacture,'a disression brominated beta-naphthol is eminfecting solution containing a chlorinated or brommated beta-naphthol having not less than three and not more than four halogen atoms per molecule, said material being dissolved in an alcoholic solution of a potash soap, said disinfecting solution producing when diluted with water, a milky solution, substantially as described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses.

HEINRICH BEGIII-IOLD.

Witnesses:

JEAN GnUNn,

CARL Gnnnn. 

